摘要
利用种子生长法制备金纳米棒,将其分散于聚乙烯醇溶液中,以戊二醛为交联剂,制备了对Hg2+有光学响应性的化学交联聚乙烯醇/金纳米棒(PVA/GNRs)复合凝胶膜。利用紫外-可见光谱法表征了该复合凝胶膜对Hg2+的传感性能。结果表明,在还原剂抗坏血酸的辅助下,PVA/GNRs凝胶对Hg2+有良好的光学响应和选择性,测量线性范围为0.1~3.0μmol/L,相关系数为0.997,响应时间为5 min。以PVA/GNRs复合凝胶膜构建的光学传感器具有制备方法简便、稳定性高等优点,可用于水样中微量Hg2+的检测。
Gold nanorods（GNRs） were prepared via a seed mediated growth method. By mixing the gold nanorods with polyvinyl alcohol （PVA） solution and using glutaraldehyde as crosslinking agent, a chemically crosslinked PVA/GNRs composite hydrogel film with mercury ions sensitivity was fabricated. UV-Vis spectrometer was utilized to characterize the stability and sensing properties of the composite hydrogel film. The results showed that PVA/GNRs hydrogels presented a good response performance and selectivity toward Hg^2＋ with the aid of reducing agent ascorbic acid. The linear range was from 0.1-3.0 μmol/L with the correlation coefficient of 0. 997,and the response time was 5 min. The optical sensor based on PVA/GNRs composite hydrogels has many advantages such as easy preparation,high stability, and could be applied to the detection of trace amounts of Hg^2＋ in water sample.
出处
《分析科学学报》
CAS
CSCD
北大核心
2016年第4期475-479,共5页
Journal of Analytical Science
基金
国家自然科学基金(No.U1204504
51473150
51373158)
中国科学院微重力重点实验室开放课题(No.NML1415KFKT5-5)
